django3.1 websocket,django3 websocket
本文主要介绍了框架中求转发到的具体使用，文中通过示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
求转发到是一种持久化的协议，HTTP协议是一种无状态的协议，在特定场合我们需要使用长连接，做数据的实时更新，这种情况下我们就可以使用求转发到做持久连接。超文本传送协议（Hyper Text Transport Protocol的缩写）与求转发到二者存在交集。
后端：
从装饰者导入接受_websocket
导入数据
# 存储连接求转发到的用户
clist=[]
@accept_websocket
def websocketLink(请求):
# 获取连接
if request.is_websocket:
# 新增用户连接信息
clist.append(request.websocket)
# 监听接收客户端发送的消息或者客户端断开连接
对于request.websocket:中的消息
破裂
# 发送消息
def websocketMsg(客户端，消息):
b1=json.dumps(msg，确保_ascii=False).编码(“utf-8”)
client.send(b1)
# 服务端发送消息
def sendmsg():
sql=select * from customer
res=db1.find_all(sql)
if len(clist)0:
因为我在：列表中
I . send(JSON。转储({ list : RES }，确保_ascii=False).编码( utf-8 ))
# websocketMsg(i，{list: res})
返回HttpResponse(“确定")
从日程安排者。调度程序。阻塞导入阻塞调度程序
def getecharts(请求):
scheduler=BlockingScheduler()
scheduler.add_job(sendmsg， interval ，seconds=1)
scheduler.start()
返回HttpResponse(“确定")
前端：
模板
div class=bgpic
van-row style= padding-top : 10px；填充-底部： 10px
van-col span=8
div id= week main style= width : 400 px；高度： 300像素/格
/范-科尔
van-col span= 8 http://API。地图。百度一下。com/marker/van-col
van-col span=8
div id= month main style= width : 400 px；高度： 300像素/格
/范-科尔
/van-row
范-罗
范-科尔span= 8 /范-科尔
范-科尔span= 8 /范-科尔
van-col span= 8"{信息列表1 } }/van-col
/van-row
/div
/模板
脚本
从“电子海图”导入*作为电子海图；
//从导入肌痛症./././https/我的axios ；
从" axios "导入axios
从“vue”导入{反应性}；
导出默认值{
名称： 我一周，
setup(){
让信息列表
1 = reactive({"data":[]})
// let mydata = reactive([])
const initdata=()=>{
var socket = new WebSocket("ws:127.0.0.1:8000/websocketLink");
socket.onopen = function () {
console.log(连接成功);//成功连接上Websocket
};
socket.onmessage = function (e) {
// alert(消息提醒: + e.data);
//打印服务端返回的数据
infolist1.data = e.data
console.log(e.data)
// mydata = infolist1.list
// console.log(mydata)
};
socket.onclose=function(e){
console.log(e);
socket.close(); //关闭TCP连接
};
}
return{
infolist1,
initdata
}
},
data(){
return{
infolist:[],
}
},
methods:{
mget(){
axios.get("http://127.0.0.1:8000/getecharts").then(res=>{
console.log(res)
})
},
infoshow(){
axios.get("http://localhost:8000/infoshow","get").then(res=>{
this.infolist=res.data.list
this.getmonth()
this.mget()
})
},
getmonth(){
var chartDom = document.getElementById(monthmain);
var myChart = echarts.init(chartDom);
var option;
// prettier-ignore
let dataAxis = [];
// prettier-ignore
let data = [];
for(let i=0;i<this.infolist.length;i++){
dataAxis.push(this.infolist[i]["name"])
data.push(this.infolist[i]["tmoney"])
}
let yMax = 10000;
let dataShadow = [];
for (let i = 0; i < data.length; i++) {
dataShadow.push(yMax);
}
option = {
title: {
text: 特性示例：渐变色 阴影 点击缩放,
subtext: Feature Sample: Gradient Color, Shadow, Click Zoom
},
xAxis: {
data: dataAxis,
axisLabel: {
inside: true,
color: #fff
},
axisTick: {
show: false
},
axisLine: {
show: false
},
z: 10
},
yAxis: {
axisLine: {
show: false
},
axisTick: {
show: false
},
axisLabel: {
color: #999
}
},
dataZoom: [
{
type: inside
}
],
series: [
{
type: bar,
showBackground: true,
itemStyle: {
color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
{ offset: 0, color: #83bff6 },
{ offset: 0.5, color: #188df0 },
{ offset: 1, color: #188df0 }
])
},
emphasis: {
itemStyle: {
color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
{ offset: 0, color: #2378f7 },
{ offset: 0.7, color: #2378f7 },
{ offset: 1, color: #83bff6 }
])
}
},
data: data
}
]
};
// Enable data zoom when user click bar.
const zoomSize = 6;
myChart.on(click, function (params) {
console.log(dataAxis[Math.max(params.dataIndex - zoomSize / 2, 0)]);
myChart.dispatchAction({
type: dataZoom,
startValue: dataAxis[Math.max(params.dataIndex - zoomSize / 2, 0)],
endValue:
dataAxis[Math.min(params.dataIndex + zoomSize / 2, data.length - 1)]
});
});
option && myChart.setOption(option);
},
getweek(){
var chartDom = document.getElementById(weekmain);
var myChart = echarts.init(chartDom);
var option;
option = {
tooltip: {
trigger: axis,
axisPointer: {
type: shadow
}
},
legend: {},
grid: {
left: 3%,
right: 4%,
bottom: 3%,
containLabel: true
},
xAxis: [
{
type: category,
data: [Mon, Tue, Wed, Thu, Fri, Sat, Sun]
}
],
yAxis: [
{
type: value
}
],
series: [
{
name: Direct,
type: bar,
emphasis: {
focus: series
},
data: [320, 332, 301, 334, 390, 330, 320]
},
{
name: Email,
type: bar,
stack: Ad,
emphasis: {
focus: series
},
data: [120, 132, 101, 134, 90, 230, 210]
},
{
name: Union Ads,
type: bar,
stack: Ad,
emphasis: {
focus: series
},
data: [220, 182, 191, 234, 290, 330, 310]
},
{
name: Video Ads,
type: bar,
stack: Ad,
emphasis: {
focus: series
},
data: [150, 232, 201, 154, 190, 330, 410]
},
{
name: Search Engine,
type: bar,
data: [862, 1018, 964, 1026, 1679, 1600, 1570],
emphasis: {
focus: series
},
markLine: {
lineStyle: {
type: dashed
},
data: [[{ type: min }, { type: max }]]
}
},
{
name: Baidu,
type: bar,
barWidth: 5,
stack: Search Engine,
emphasis: {
focus: series
},
data: [620, 732, 701, 734, 1090, 1130, 1120]
},
{
name: Google,
type: bar,
stack: Search Engine,
emphasis: {
focus: series
},
data: [120, 132, 101, 134, 290, 230, 220]
},
{
name: Bing,
type: bar,
stack: Search Engine,
emphasis: {
focus: series
},
data: [60, 72, 71, 74, 190, 130, 110]
},
{
name: Others,
type: bar,
stack: Search Engine,
emphasis: {
focus: series
},
data: [62, 82, 91, 84, 109, 110, 120]
}
]
};
option && myChart.setOption(option);
},
},
mounted() {
this.infoshow()
this.getweek()
this.initdata()
}
}
</script>
<style scoped>
.bgpic{
background-image: url("../../../https/4.jpg");
width: 1269px;
height: 781px;
}
</style>
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